CN107643362B - Method for testing gas release rate and components of calcium carbide dust in case of wetting - Google Patents
Method for testing gas release rate and components of calcium carbide dust in case of wetting Download PDFInfo
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Abstract
The invention relates to a method for testing the gas release rate and components of calcium carbide dust when meeting moisture, and mainly solves the problem that the release rate and composition detection effect of flammable and explosive gas produced by the reaction of the calcium carbide dust and water vapor in the prior art are poor. The invention adopts a test method of the gas releasing rate and components of calcium carbide dust when meeting moisture, and adopts a test device of the gas releasing rate and components of the calcium carbide dust when meeting moisture to test the gas releasing rate and the components of the calcium carbide dust when meeting moisture, wherein the test device of the gas releasing rate and the components of the calcium carbide dust when meeting moisture comprises a water vapor pre-mixer, a precise hygrometer, calcium carbide dust raising equipment, a calcium carbide dust raising controller, a gas releasing rate test system, a gas component test system and a computer control system; the water vapor premixer can generate water vapor with different humidity, the technical scheme that the water vapor premixer is connected with the precision hygrometer well solves the problems, and the water vapor premixer can be used for testing the gas releasing rate and components when the calcium carbide dust is wet.
Description
Technical Field
the invention relates to a method for testing the gas release rate and components of calcium carbide dust when meeting moisture.
background
In recent years, the rapid development of the calcium carbide industry in China has increased the annual output, but the traditional calcium carbide production process needs a large amount of manual operation, and has low efficiency and complex operation. Workers of enterprises need to carry out high-strength operation under severe conditions of high temperature and high dust, and great potential safety hazards exist. The calcium carbide dust removal system plays a key role in reducing dust harm in the calcium carbide discharging process and guaranteeing the occupational health of dust removal workers. However, the dust contains unreacted calcium carbide, and carbon monoxide and hydrogen in the calcium carbide furnace may be partially brought out along with the calcium carbide discharging process, so that the calcium carbide dust removal system has certain burning explosion danger. In the actual production process, flash explosion accidents in the calcium carbide dust remover also occur. Therefore, the release rate and the release amount of acetylene and other combustible gases generated by calcium carbide dust when wet are determined, and the concentration of the acetylene and other combustible gases is controlled to be out of the explosion limit range, so that the method has very important significance for ensuring the safety of calcium carbide production devices.
According to the results of literature search, the existing test method for flammable gas evolution when wet at home and abroad is mainly the proposal-test and standard manual for dangerous goods transportation in United nations (hereinafter referred to as the test and standard manual) 4.3 test methods for flammable gas evolution when wet (a device for testing the rate of flammable gas evolution when wet of a substance, patent No. ZL 200810160135.9). The method is used for testing the velocity of the inflammable gas generated by the inflammable gas substances which are emitted when encountering moisture at any moment in the process of reacting with the water, and can monitor the velocity of the gas generated by the inflammable gas substances which are encountered when encountering moisture in the process of contacting the water. In the test process, water is added into the moisture-encountering substance, and the moisture-encountering substance can be uniformly dispersed in the water and fully reacts with the water. However, in the production process of calcium carbide dust, dust in a similar dust raising environment is contacted with water vapor to react, and the test method for the rate of releasing inflammable gas when the calcium carbide dust is wet in the test and standard handbook cannot fully and uniformly mix the water vapor with a wet substance and cannot perform real-time analysis on the composition of the generated gas. Therefore, the calcium carbide dust can fully react with water vapor in a dust raising environment, the release rate of the generated gas and the gas composition can be tested in real time, and the method has great significance for guaranteeing the safety production of the calcium carbide production device.
The invention provides a test method for the rate and components of gas released by calcium carbide dust when wet, which realizes the reaction of fully mixing water vapor and the calcium carbide dust in a calcium carbide dust raising environment through simulation, monitors the release rate of the gas released by the calcium carbide dust when wet by adopting a gas release rate test system, and immediately analyzes the components of the gas released by the calcium carbide dust when wet by adopting a gas component test system, so that the test result is closer to the real working condition of the calcium carbide dust and the water vapor in a calcium carbide production device, and is more oriented to the operating environment of an industrial device.
disclosure of Invention
The invention aims to solve the technical problems that the release rate and composition detection effect of combustible and explosive gas produced by the reaction of calcium carbide dust and water vapor are poor in the prior art, and provides a novel method for testing the gas release rate and components of calcium carbide dust when the calcium carbide dust is wet. The method has the advantages of good release rate and composition detection effect of combustible and explosive gas produced by the reaction of calcium carbide dust and water vapor.
In order to solve the problems, the technical scheme adopted by the invention is as follows: a test method of gas releasing rate and components of calcium carbide dust when wet is adopted, a test device of gas releasing rate and components of calcium carbide dust when wet is adopted to test the gas releasing rate and the components of the calcium carbide dust when wet, and the test device of gas releasing rate and the components of calcium carbide dust when wet comprises a water vapor generator, a water vapor premixer, a precise hygrometer, a calcium carbide dust raising device, a calcium carbide dust raising controller, a gas releasing rate test system, a gas component test system and a computer control system; the water vapor premixer can generate water vapor with different humidity, a precision hygrometer is connected to the water vapor premixer and used for monitoring the humidity in the water vapor premixer in real time, and the generated water vapor with different humidity enters the calcium carbide dust raising equipment and is fully mixed and reacted with calcium carbide dust in the calcium carbide dust raising equipment; carbide dust raise dust equipment can simulate the carbide dust raise dust environment similar with operating condition, and the flammable and explosive gas that generates after different humidity steam and the carbide dust reaction gets into the gaseous release rate test system and the gaseous component test system who is connected with computer control system, and the release rate and the gaseous constitution that the flammable and explosive gas of instantaneous test generation generated specifically include following step:
1) Firstly, a precision hygrometer is calibrated to ensure that pipelines and data lines of all parts of the device are normally connected and a gas release rate testing system and a gas component testing system are normal;
2) Starting a computer control system, and starting a gas release rate test system and gas component test system control system software;
3) opening a calcium carbide dust raising controller, and operating calcium carbide dust raising equipment which adds calcium carbide dust in advance to generate calcium carbide dust;
4) Opening a precision hygrometer, and monitoring the humidity in the water vapor premixer in real time;
5) Opening a water vapor generator, controlling the quality of water vapor entering the water vapor premixer through a control valve of the water vapor generator, and generating water vapor with the humidity required by the experiment by matching with a precision hygrometer;
6) The generated water vapor with different humidity is conveyed to calcium carbide dust raising equipment through a control valve of a water vapor premixer, so that the water vapor and the calcium carbide dust are fully mixed and react;
7) The release rate of flammable and explosive gas generated in the calcium carbide dust raising equipment is tested in real time through a gas release rate testing system;
8) the composition of combustible and explosive gas generated in the calcium carbide dust raising equipment is tested in real time through a gas component testing system;
9) carrying out gas recovery and waste disposal on the tested flammable and explosive gas;
10) after the experiment is finished, the experimental data are stored, the power supplies of all the devices are turned off in the order opposite to the turn-on order, related pipelines and circuits are arranged, and the calcium carbide dust raising device is cleaned, dried and reserved.
Among the above-mentioned technical scheme, preferably, carbide dust raise dust equipment places in carbide dust raise dust controller top, is connected with water vapor premixer and gas release rate test system for the carbide dust that generates the raise dust environment reacts with the different humidity steam that gets into wherein, carries the flammable explosive gas that produces to gas release rate test system simultaneously.
among the above-mentioned technical scheme, preferably, carbide dust raise dust controller: the device is placed below the calcium carbide dust raising equipment and used for controlling the rotating speed of the calcium carbide dust raising equipment and ensuring that the calcium carbide dust is always in a raising environment.
In the above technical scheme, preferably, the gas release rate test system is connected with the calcium carbide dust raising equipment, the gas component test system and the computer control system, and is used for testing the rate of flammable and combustible gas generated in the calcium carbide dust raising equipment and simultaneously conveying the flammable and combustible gas with the tested release rate to the gas component test system.
the invention provides a test method for analyzing the release rate and composition of inflammable and explosive gas released by the reaction of water vapor and calcium carbide dust, and scientific research units and enterprises engaged in calcium carbide production and calcium carbide production safety research and design have certain requirements on the method. With the gradual improvement of the related technologies of calcium carbide production in China, the method has considerable application and popularization values in enterprises for calcium carbide production, safety research and design and other scientific research units. Compared with the prior art at home and abroad, the device has the following advantages: 1) can generate water vapor with different humidity; 2) the calcium carbide dust raising environment similar to the actual working condition of a calcium carbide production device can be simulated; 3) the system can be used for carrying out full mixing reaction with calcium carbide dust in the calcium carbide dust raising environment by water vapor with different humidity through a control system, and carrying out real-time data acquisition and analysis on the release rate and composition of generated inflammable and explosive gas. The test method disclosed by the invention is used for testing the combustible and explosive gas produced by the reaction of the calcium carbide dust and the water vapor, and can be used for effectively acquiring and analyzing the release rate and the composition of the generated combustible and explosive gas in real time in the test process, so that the use condition is stable, and a better technical effect is obtained.
Drawings
FIG. 1 is a schematic flow diagram of the process of the present invention.
In fig. 1, 1-a water vapor generator, 2-a water vapor generator control valve, 3-a water vapor premixer, 4-a water vapor premixer control valve, 5-a precision hygrometer, 6-a calcium carbide dust raising device, 7-a calcium carbide dust raising controller, 8-a humidity regulating valve, 9-a gas release rate testing system, 10-a gas component testing system, and 11-a computer control system.
The present invention will be further illustrated by the following examples, but is not limited to these examples.
Detailed Description
[ example 1 ]
The invention discloses a method for testing the gas release rate and components of calcium carbide dust when meeting moisture, and mainly relates to a method for testing the release rate and composition analysis of inflammable and explosive gas released by the reaction of water vapor and calcium carbide dust, which can generate water vapor with different humidity and simulate calcium carbide dust flying environment similar to the actual working condition of a calcium carbide production device, and improves the existing method for testing the gas release rate and components when meeting moisture. The test system for the gas release rate and components of calcium carbide dust when meeting moisture mainly comprises the following parts:
1) a water vapor generator: is connected with the water vapor premixer and is used for producing water vapor.
2) Water vapor generator control valve: and the steam pre-mixer is connected with the steam generator and the steam pre-mixer and is used for communicating and cutting off the steam from the steam generator to the steam pre-mixer.
3) A water vapor premixer: and the water vapor is connected with calcium carbide dust raising equipment and used for introducing the generated water vapor with different humidity into the calcium carbide dust raising equipment for reaction.
4) Control valve of steam pre-mixer: and the water vapor pre-mixer is connected with the calcium carbide dust raising equipment and is used for communicating and shutting off water vapor with different humidity to the calcium carbide dust raising equipment.
5) A precision hygrometer: the device is connected to the water vapor premixer and is used for monitoring the water vapor humidity in the water vapor premixer in real time so as to produce water vapor with different humidity.
6) Calcium carbide dust raising equipment: the device is placed above a calcium carbide dust flying controller, is connected with a water vapor premixer and a gas release rate testing system, and is used for generating calcium carbide dust in a flying dust environment, reacting with water vapor with different humidity entering the calcium carbide dust, and simultaneously conveying generated inflammable and explosive gas to the gas release rate testing system.
7) Carbide dust raise dust controller: the device is placed below the calcium carbide dust raising equipment and used for controlling the rotating speed of the calcium carbide dust raising equipment and ensuring that the calcium carbide dust is always in a raising environment.
8) Humidity control valve: the device is connected to a pipeline between calcium carbide dust raising equipment and a gas speed testing device and is mainly used for controlling the quality of water vapor entering the calcium carbide dust raising equipment.
9) gas release rate test system: and the combustible and explosive gas testing system is connected with the calcium carbide dust raising equipment, the gas component testing system and the computer control system and is used for testing the speed of combustible and explosive gas generated in the calcium carbide dust raising equipment and conveying the combustible and explosive gas with tested release speed to the gas component testing system.
10) gas composition test system: and the computer control system is connected with the gas release rate testing system and the computer control system and is used for analyzing the composition of the flammable and explosive gas after the release rate is tested and simultaneously conveying the flammable and explosive gas after the test to the gas processing system for waste disposal.
11) the computer control system: the system consists of a signal acquisition card, a digital-to-analog converter and pre-programmed computer software.
Wherein, water vapor generator, accurate hygrometer are purchase outward, and computer control system, water vapor generator control valve, water vapor premixer control valve, humidity control valve, gaseous release rate test system, gaseous component test system are the customization, and water vapor premixer, carbide dust raise dust equipment, carbide dust raise dust controller are for designing and making by oneself.
The calcium carbide dust raising device is provided with a water vapor premixer capable of generating water vapor with different humidity, the water vapor premixer is connected with a precision hygrometer and used for monitoring the humidity in the water vapor premixer in real time, and the generated water vapor with different humidity enters calcium carbide dust raising equipment and is fully mixed and reacted with calcium carbide dust in the calcium carbide dust raising equipment; the calcium carbide dust flying equipment can simulate a calcium carbide dust flying environment similar to the actual working condition, combustible and explosive gas generated after water vapor with different humidity reacts with calcium carbide dust enters a gas release rate testing system and a gas component testing system which are connected with a computer control system, and the release rate and the gas composition of the combustible and explosive gas are immediately tested.
When the invention is used, firstly, the precision hygrometer is calibrated, the normal connection of pipelines and data lines of each part of the device is ensured, the normal connection of a gas release rate test system and a gas component test system is ensured, and then the test is carried out according to the following steps:
1) starting a computer control system, and starting a gas release rate test system and gas component test system control system software;
2) Opening a calcium carbide dust raising controller, and operating calcium carbide dust raising equipment which adds calcium carbide dust in advance to generate calcium carbide dust;
3) opening a precision hygrometer, and monitoring the humidity in the water vapor premixer in real time;
4) Opening a water vapor generator, controlling the quality of water vapor entering the water vapor premixer through a control valve of the water vapor generator, and generating water vapor with the humidity required by the experiment by matching with a precision hygrometer;
5) the generated water vapor with different humidity is conveyed to calcium carbide dust raising equipment through a control valve of a water vapor premixer, so that the water vapor and the calcium carbide dust are fully mixed and react;
6) The release rate of flammable and explosive gas generated in the calcium carbide dust raising equipment is tested in real time through a gas release rate testing system;
7) the composition of combustible and explosive gas generated in the calcium carbide dust raising equipment is tested in real time through a gas component testing system;
8) Carrying out gas recovery and waste disposal on the tested flammable and explosive gas;
9) After the experiment is finished, the experimental data are stored, the power supplies of all the devices are closed according to the sequence opposite to the opening sequence, related pipelines and circuits are arranged, and the calcium carbide dust raising equipment is cleaned, dried and reserved.
by adopting the method, the release rate and the composition of the generated flammable and explosive gas can be effectively acquired and analyzed in real time in the test process, the use condition is stable, and better technical effects are achieved.
[ COMPARATIVE EXAMPLE ]
adopt the device that test material met water and emit combustible gas speed (unanimous with the device test method that test material met water and emit combustible gas speed) to carry out carbide dust and meet water vapor and emit acetylene gas test, let water vapor and carbide dust contact reaction 20 minutes after, utilize the sampling pump to collect the gas in the circulation system, adopt the acetylene content in the gas chromatograph analysis collection gas, the test result is as follows:
| peak(s) | retention time/min | peak width/min | Peak area/25. mu.V.s | Peak height/25 μ V |
| 1 | 1.033 | 0.0119 | 1.92254 | 2.52696 |
| 2 | 1.462 | 0.0296 | 218.64594 | 103.55457 |
| 3 | 1.834 | 0.0250 | 15.32018 | 8.94742 |
The analysis gave an acetylene gas peak area of about 218.65. mu.V.s.
The device disclosed by the invention is used for testing the calcium carbide dust to emit acetylene gas when meeting water vapor, the gas in a circulation system is collected by using a sampling pump after the water vapor is in contact reaction with the calcium carbide dust for 20 minutes, the acetylene content in the collected gas is analyzed by using a gas chromatograph, and the test results are as follows:
| peak(s) | Retention time/min | peak width/min | Peak area/25. mu.V.s | Peak height/25 μ V |
| 1 | 0.856 | 0.0198 | 10.02244 | 7.91432 |
| 2 | 1.235 | 0.0527 | 902.24829 | 230.39986 |
| 3 | 1.632 | 0.0422 | 68.20010 | 23.95535 |
The analysis gave an acetylene gas peak area of about 902.24. mu.V.s.
By comparison, the peak area of acetylene gas obtained by the reaction of water vapor and calcium carbide dust by adopting the device disclosed by the invention is about 902.24 muV.s, the peak area of acetylene gas obtained by adopting a device for testing the inflammable gas rate released by a substance meeting water (which is consistent with the testing method of a device for testing the inflammable gas rate released by a substance meeting water, and the patent number is ZL200810160135.9) is about 218.65 muV.s, and the concentration of the acetylene gas obtained by the device disclosed by the invention is higher. Therefore, the device disclosed by the invention is closer to the reaction of calcium carbide dust and water vapor generated in the actual production working condition process of a factory, and the test result is more real and accurate.
Claims (4)
1. A test method of gas releasing rate and components of calcium carbide dust when wet is adopted, a test device of gas releasing rate and components of calcium carbide dust when wet is adopted to test the gas releasing rate and the components of the calcium carbide dust when wet, and the test device of gas releasing rate and the components of calcium carbide dust when wet comprises a water vapor generator, a water vapor premixer, a precise hygrometer, a calcium carbide dust raising device, a calcium carbide dust raising controller, a gas releasing rate test system, a gas component test system and a computer control system; the water vapor premixer can generate water vapor with different humidity, a precision hygrometer is connected to the water vapor premixer and used for monitoring the humidity in the water vapor premixer in real time, and the generated water vapor with different humidity enters the calcium carbide dust raising equipment and is fully mixed and reacted with calcium carbide dust in the calcium carbide dust raising equipment; carbide dust raise dust equipment can simulate the carbide dust raise dust environment similar with operating condition, and the flammable and explosive gas that generates after different humidity steam and the carbide dust reaction gets into the gaseous release rate test system and the gaseous component test system who is connected with computer control system, and the release rate and the gaseous constitution that the flammable and explosive gas of instantaneous test generation generated specifically include following step:
1) Firstly, a precision hygrometer is calibrated to ensure that pipelines and data lines of all parts of the device are normally connected and a gas release rate testing system and a gas component testing system are normal;
2) Starting a computer control system, and starting a gas release rate test system and gas component test system control system software;
3) Opening the calcium carbide dust raising controller, operating calcium carbide dust raising equipment which adds calcium carbide dust in advance,
So that calcium carbide dust is generated;
4) opening a precision hygrometer, and monitoring the humidity in the water vapor premixer in real time;
5) opening a water vapor generator, controlling the quality of water vapor entering the water vapor premixer through a control valve of the water vapor generator, and generating water vapor with the humidity required by the experiment by matching with a precision hygrometer;
6) The generated water vapor with different humidity is conveyed to calcium carbide dust raising equipment through a control valve of a water vapor premixer, so that the water vapor and the calcium carbide dust are fully mixed and react;
7) the release rate of flammable and explosive gas generated in the calcium carbide dust raising equipment is tested in real time through a gas release rate testing system;
8) The composition of combustible and explosive gas generated in the calcium carbide dust raising equipment is tested in real time through a gas component testing system;
9) Carrying out gas recovery and waste disposal on the tested flammable and explosive gas;
10) after the experiment is finished, the experimental data are stored, the power supplies of all the devices are turned off in the order opposite to the turn-on order, related pipelines and circuits are arranged, and the calcium carbide dust raising device is cleaned, dried and reserved.
2. The method for testing the gas release rate and components of calcium carbide dust in case of moisture according to claim 1, wherein a calcium carbide dust raising device is placed above a calcium carbide dust raising controller, is connected with a water vapor premixer and a gas release rate testing system, and is used for generating calcium carbide dust in a dust raising environment, reacting with water vapor with different humidity entering the calcium carbide dust, and simultaneously conveying generated flammable and explosive gas to the gas release rate testing system.
3. The method for testing the gas release rate and components of calcium carbide dust in the presence of moisture according to claim 1, wherein the calcium carbide dust emission controller comprises: the device is placed below the calcium carbide dust raising equipment and used for controlling the rotating speed of the calcium carbide dust raising equipment and ensuring that the calcium carbide dust is always in a raising environment.
4. The method for testing the gas release rate and components of calcium carbide dust in the presence of moisture according to claim 1, wherein the gas release rate testing system is connected with the calcium carbide dust raising equipment, the gas component testing system and the computer control system, and is used for testing the rate of flammable and combustible gas generated in the calcium carbide dust raising equipment and simultaneously conveying the flammable and combustible gas with the tested release rate to the gas component testing system.
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| CN100427390C (en) * | 2006-02-24 | 2008-10-22 | 昆明理工大学 | Method of purifying furnace gas of closed calcium carbide furnace |
| CN101413862B (en) * | 2008-11-11 | 2010-12-01 | 中国石油化工股份有限公司 | Apparatus for testing velocity of inflammable gas given out by substance when contacting with water |
| CN202022894U (en) * | 2010-10-28 | 2011-11-02 | 国电英力特能源化工集团股份有限公司 | Airflow semidry method acetylene generator |
| CN102109448B (en) * | 2011-01-10 | 2012-10-03 | 王利兵 | Tester for measuring degassing rate of dangerous chemical under condition of meeting water |
| RU110734U1 (en) * | 2011-06-07 | 2011-11-27 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Сибирскиий федеральный университет" (СФУ) | LINE FOR PROCESSING CARBON CARBONATE MINERAL RAW MATERIALS |
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